- Find your directional light, Skylight, Sky Atmosphere and Exponential Height Fog in your level and delete them.
- Go to Window - Environment Light Mixer to open up the corresponding window.
- Create a Sky Light, Atmospheric Light, Sky Atmosphere and Volumetric Cloud.
- Group all of the Light items you have created in the World outliner by highlighting them and pressing the new group button in the top right of the panel.
- Adjust all of your lighting values in one place Using the Environment Light Mixer.